Delaware, IA Weather & Growing Conditions
Overnight
64°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 3am, then a chance of showers and thunderstorms between 3am and 4am, then patchy fog and occasional showers and thunderstorms. Cloudy, with a low around 64. Southeast wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Showers And Thunderstorms Likely | 10 mph SE | 89% |
| Saturday | 77°F | Patchy Fog | 5 to 10 mph S | 82% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph NW | 77% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Sunday Night | 54°F | Chance Rain Showers | 15 mph NE | 36% |
| Monday | 62°F | Chance Rain Showers | 15 mph NE | 36% |
| Monday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday | 61°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 31% |
| Tuesday Night | 45°F | Mostly Clear | 5 to 10 mph NE | 5% |
| Wednesday | 64°F | Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 8% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 6% |
| Friday | 68°F | Mostly Sunny | 5 mph E | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Delaware, IA
Last spring frost
May 3
First fall frost
Oct 4
Growing season
154 days
Hardiness zone
4b
Explore more for Delaware, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Manchester #2, Ia (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.